每年出版 6 期
ISSN 打印: 1948-2590
ISSN 在线: 1948-2604
NEW TYPE OF PULSED THERMAL ACTUATOR
摘要
Methods to control the gas flow around an aircraft by pulsed thermal actuators of various types are considered. The operation principles and flight modes in which they can be effectively used are discussed. It is argued that the known types of plasma actuators can be effective only at low flight velocities of unmanned aerial vehicles. To extend the range of flight velocities, a new type of actuator is considered, namely, a pulsed thermal actuator. The calculations show that this actuator has a serious disadvantage, which is active zone overheating at high pulse repetition frequencies. Several types of pulsed thermal actuators are proposed and studied. One of which (an open-ended actuator) is designed for operation at high repetition frequencies and transonic flow velocities. Its potential capability of operation at frequencies on the order of 1 kHz is demonstrated, which is sufficient to control the majority of aerodynamic processes at high subsonic velocities. It is shown that the use of such actuators in applications with tangential jet flows is much less effective from the energy point of view compared to boundary layer suction. A new type of actuator (an ejector-type pulsed thermal actuator) is proposed for the suction regime. This actuator provides simultaneous suction of the boundary layer from the upper surface of the wing and gas ejection in the trailing edge region. The suction velocity ensured by the operating model of the actuator is determined in experiments by hot wire anemometry.
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Voevodin A. V., Kornyakov A. A., Petrov A. S., Petrov D. A., Sudakov G. G., Improvement of the take-off and landing characteristics of wing using an ejector pump, Thermophysics and Aeromechanics, 26, 1, 2019. Crossref